About the helmets, i have found a lot of them for primaris black templar on shapeway who look kinda cool imo
There are ways to play Black Templar very shooty too. Its confusing but they are in the Space Marine codex, so they have their strength und weakness too.
There a few relics and Litanies what makes them extrem powerful.
Ok so if i take out shooting units as black templar along with a lot of melee and i would be still fluffy enough ?
Sadly, the answer is that almost none of the existing Primaris units work especially well for Black Templars. Aggressors, Intercessors with thunder hammer sergeants, and Incursors all do fine with our in-your-face playstyle, although they're not perfect.
Repulsors are sadly not very good for anybody, but if you really want to run one, Black Templars are probably your best bet, since we can give it 4++ with a relic and 5+++ with a litany. The problem is that so far, there aren't any Primaris units worth 300 points for a delivery vehicle. Thematically, it's perfectly fitting; the Land Raider Crusader was our signature vehicle for a while, and putting those buffs on an LRC full of Assault Centurions is still pretty good.
And what about the big boy repex ? I like big tank and he look like a madness shooting platform but would it be "fluff" to use it ?
For example, im looking at SW but i want to play some iron wolves, who are basicly mecanised SW, so playing tank with them is "logical"
I don't know black templar enough, i know they are fanatic who want to reach melee a lot but if i pick heavy support for them, i would like to follow the fluff too. I think i could take dread without any problem but a repex ?
In a more general way, what should i look at or buy to have a first look about black templars ? Since they didn't make any book or supplement, beside the V2 SM codex what other source of information i have ?